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PASSEDdatabase / gc_pressure
ClickHouse 24.3 GC Pauses Causing Latency Spikes on Amazon Linux 2023
ClickHouse 24.3 is experiencing excessive garbage collection pauses. Response times spiking during GC cycles. P99 latency 10x normal.
Pattern
PERFORMANCE_DEGRADATION
Severity
MEDIUM
Confidence
51%
Remediation
Auto-Heal
Test Results
| Metric | Expected | Actual | Result |
|---|---|---|---|
| Pattern Recognition | PERFORMANCE_DEGRADATION | PERFORMANCE_DEGRADATION | |
| Severity Assessment | HIGH | MEDIUM | |
| Incident Correlation | N/A | None | |
| Cascade Escalation | N/A | No | |
| Remediation | — | Auto-Heal — Corax resolves autonomously |
Scenario Conditions
Amazon Linux 2023. ClickHouse 24.3 GC pause time 320ms. GC frequency: every 5 seconds. Heap at 90%. Response time degraded 44x.
Injected Error Messages (1)
ClickHouse 24.3 degraded performance on Amazon Linux 2023 — garbage collection pauses 320ms, response time spike 44x normal, high latency during GC cycles, P99 latency critical
Neural Engine Root Cause Analysis
Performance degradation detected — response times are significantly above baseline, indicating resource pressure, increased load, or infrastructure issues.
Remediation Plan
Investigate server resource usage (CPU, memory, disk I/O). Check for background jobs or traffic spikes. Optimize slow queries or endpoints if specific to one service.
Improvements Applied
- Severity: MEDIUM (expected HIGH)
Tested: 2026-04-02Monitors: 1 | Incidents: 1Test ID: cmnhnvxdu02yelijgpdwfbzat